黑暗双星显示于地球的对面，这不仅可以从它在太阳对面看出来，还有它和地球都采用的逆时针轨道方向。

The Dark Twin is shown opposite the Earth, identified not only by being on the opposite side of the Sun but by the counterclockwise orbit direction that they both assume.

youdao

该行星轨道的方向不断变化。

The orientation of the planet's orbit is changing continuously.

《牛津词典》

圆盘产生自己的引力拖曳，这种相互作用的力夺走了行 星在其轨道上的动量，迫使它盘旋向恒星的方向。

The disk exerts its own gravitational tug, and this interplay of forces robs the planet of momentum in its orbital path, forcing it to spiral in toward the star.

youdao

The only thing that is different about these orbitals is their orientation in space.

这些轨道唯一的不同之处,是在空间的方向不同。

麻省理工公开课 - 化学原理课程节选

So it's along the bond axis and it's between a carbon s p 2 hybrid, and then the hydrogen is just a 1 s orbital that we're combining here.

所以它是沿着键轴方向的,而且这里是一个碳sp2杂化轨道，和一个氢的1s轨道的结合,在这里我们可以合并他们。

麻省理工公开课 - 化学原理课程节选

So we can also show them coming together this way, so now you're looking at it where you can see the p orbital, and maybe just see well one of the hydrogen atoms.

我们也可以看到它们从这个方向靠拢，现在你看的方向你可以看到p轨道，也许可以看到一个氢原子。

麻省理工公开课 - 化学原理课程节选